03 July 2017 A new generation superconducting gravimeter was installed by the EOST / IPG Strasbourg gravimetry team in a building of the TDF antenna on the summit of the Strengbach watershed in the Vosges Mountains (Observatoire HydroGéochimique de l’Environnement, OHGE). This instrument is one of the three superconducting gravimeters acquired as part of the CRITEX Excellence project, which also […]

The ENIGMA ITN (European training Network for in situ imaGing of dynaMic processes in heterogeneous subsurfAce environments) aims at training a new generation of young researchers in the development of innovative methods for imaging process dynamics in subsurface hydrosystems, in order to enhance understanding and predictive modelling capacities and to transfer these innovations to the economic sector. Scientific and technological […]

SWIP is a toolbox developed by Sylvain Pasquet, providing an integrated workflow for surface-wave dispersion inversion and profiling, recently successfully applied to the CZ imaging. A tutorial has been published in Geophysics: Sylvain Pasquet and Ludovic Bodet (2017). ”SWIP: An integrated workflow for surface-wave dispersion inversion and profiling.” GEOPHYSICS, 82(6), WB47-WB61. https://doi.org/10.1190/geo2016-0625.1 The code is available at the following link: […]

The simultaneous estimation of 2D pressure (P-) and S-wave velocities (VP and VS, respectively) is a promising approach for imaging subsurface mechanical properties. It can be performed with a single acquisition setup by combining P-wave refraction and surface-wave (SW) analysis. Although SW methods are commonly applied for the 1D estimation of VS, 2D profiling requires the implementation of specific processing […]

Electrical and electromagnetic methods are extensively used to map electrically conductive tracers within hydrogeologic systems. Often, the tracers used consist of dissolved salt in water, leading to a denser mixture than the ambient formation water. Density eﬀects are often ignored and rarely modeled but can dramatically aﬀect transport behavior and introduce dynamics that are unrepresentative of the response obtained with […]

The detection of preferential flow paths and the characterization of their hydraulic properties are major challenges in fractured rock hydrology. In this study, we propose to use temperature as a passive tracer to characterize fracture connectivity and hydraulic properties. In particular, we propose a new temperature tomography field method in which borehole temperature profiles are measured under different pumping conditions […]

Implying large residence times and complex water origins deep coastal aquifers are of particular interest as they are remarkable markers of climate, water use and land use changes. Over the last decades, the Metropolitan Region of Recife (Brazil) went through extensive environmental changes increasing the pressure on water resources and giving rise to numerous environmental consequences on the coastal groundwater […]

On May 10-12 2017, a plenary meeting of CRITEX was held at Institut des Géosciences de l’Environnement de Grenoble (IGE) and Centre de l’Escandille, Autrans. Approximately 100 participants (WP leaders, site managers, guests and external members, ANR representative) met for three days to take stock of the program avancement and to think about the best ways to study the critical zone of […]

Editorial Welcome to the 2016 CRITEX’s Newsletter! You will find in this issue a report of the main events and achievements of the program in 2016, including a descrpition of each workpackage and interviews of Jean François Soussana from the National Institute for Agricultural Research and Alexandra Arènes, a landscape Architect that is fascinated by the Critical Zone Scientists… Three […]